Use the following information to answer the questions below.
You have learned about research conducted during the 1930s by van Niel,who studied photosynthesis in bacteria,which were observed to not release O₂ even though they fixed CO₂.
-From his experiments,van Niel concluded that
A)he must have done something wrong.
B)something else was being used to provide hydrogen.
C)CO₂ was not being split to produce O₂.
D)CO₂ was directly involved in O₂ production.
E)H₂O was being used to provide hydrogen.